1.
Multiply 2916372128 by 25 without the help of calculator.
2.
0.17 ÷ a² = 17. Find 'a'.
3.
How many prime numbers are there in the first 150 natural numbers?
4.
The product of two numbers is 1280 and their H.C.F. is 8. What will be the L.C.M. of the two numbers ?
5.
LCM of two co-prime numbers is 176. What is the sum of these numbers?
6.
Use the digits 3,4 and 5 to form the largest and the smallest mixed fractions. What is the sum of the two fractions?
7.
The final ratio of two quantities can be expressed as ⅜ : ⅓ .
8.
Simplify: 3 . a° . b² . c°
9.
Which of the following numbers is not divisible by 18 ?
10.
The product of two co -prime numbers is 117. What is their L.C.M. ?
11.
What is the maximum difference of two consecutive prime numbers up to 100 ?
12.
What is 12 and half multiplied by itself?
14.
Is it possible to have product of sum and difference of two numbers as −33 in each case? If yes, find the difference of the two numbers.
15.
What is the least number which when decreased by 7 is divisible by each of the numbers 10, 15, 30 and 36 separately ?
16.
What is the last digit of the product of all the prime numbers up to 100 ?
17.
What is the remainder obtained when a prime number greater than 6 is divided by 6 ?
18.
What is difference between − 37 and 63?
19.
Which of the following numbers is not divisible by 18 ?
20.
Which is greater x+4 or x-4 for any negative value of x ?
